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<div class="section" id="c-str">
<h1><a class="toc-backref" href="./string-operations.html#id1562">c_str</a></h1>
<div class="section" id="id1137">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename Sequence
    &gt;
struct <a href="./c-str.html" class="identifier">c_str</a>
{
    typedef <em>unspecified</em> type;
    static char const value[];
};
</pre>
</div>
<div class="section" id="id1138">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p><tt class="literal"><span class="pre"><a href="./c-str.html" class="identifier">c_str</a></span></tt> converts the <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> of <a class="reference internal" href="./integral-constant.html">Integral Constant</a>s <tt class="literal"><span class="pre">Sequence</span></tt>
into a null-terminated byte string containing an equivalent sequence.</p>
</div>
<div class="section" id="id1139">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/string.hpp" class="header">boost/mpl/string.hpp</a>&gt;
</pre>
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<div class="section" id="id1140">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<p><a class="reference internal" href="./metafunction.html">Metafunction</a></p>
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<div class="section" id="id1141">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<col width="17%" />
<col width="30%" />
<col width="53%" />
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<thead valign="bottom">
<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> of
<a class="reference internal" href="./integral-constant.html">Integral Constant</a>s</td>
<td>A sequence to be converted into a
null-terminated byte string.</td>
</tr>
</tbody>
</table>
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<div class="section" id="id1142">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<div class="expression-semantics compound">
<p class="compound-first">For any <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> of <a class="reference internal" href="./integral-constant.html">Integral Constant</a>s <tt class="literal"><span class="pre">s</span></tt>,</p>
<pre class="compound-middle literal-block">
<a href="./c-str.html" class="identifier">c_str</a>&lt;s&gt;::value;
</pre>
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<col class="field-name" />
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<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A null-terminated byte string.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span> <span class="pre">&lt;=</span> <span class="pre">BOOST_MPL_STRING_MAX_LENGTH</span></tt>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
char const value[] = {
    <a href="./at.html" class="identifier">at</a>&lt;s, 0&gt;::type::value
  , ...
  , <a href="./at.html" class="identifier">at</a>&lt;s, <a href="./size.html" class="identifier">size</a>&lt;s&gt;::value-1&gt;::type::value
  , '\0'
};
</pre>
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<div class="section" id="id1143">
<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
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<thead valign="bottom">
<tr><th class="head">Sequence archetype</th>
<th class="head">Complexity</th>
</tr>
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<tbody valign="top">
<tr><td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
<td>Linear.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id1144">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
typedef <a href="./vector-c.html" class="identifier">vector_c</a>&lt;char,'h','e','l','l','o'&gt; hello;
assert( 0 == std::strcmp( <a href="./c-str.html" class="identifier">c_str</a>&lt;hello&gt;::value, &quot;hello&quot; ) );
</pre>
</div>
<div class="section" id="id1145">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>, <a class="reference internal" href="./integral-constant.html">Integral Constant</a>, <a class="reference internal" href="./string.html">string</a></p>
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